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Financial Statement Schedule I - Condensed Financial Information of Parent Company Statements of Cash Flows (Details) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |
Net loss |  | ¥ (395,165) | $ (56,763) | ¥ (926,950) | ¥ (918,714)
Adjustments to reconcile net loss to net cash generated from operating activities: |  |  |  |  |
Share-based compensation |  | 2,970 | 427 | 3,851 | 288,763
Loss from investment in subsidiaries |  | 136 | 20 | (1,710) | 4,890
Prepaid expenses and other current assets |  | (39,769) | (5,712) | (92,291) | (30,222)
Other non-current assets |  | 3,446 | 495 | (4,286) | (7,480)
Accrued expenses and other current liabilities |  | 25,216 | 3,622 | 214,697 | 164,245
Net cash generated from/(used in) operating activities |  | (533,547) | (76,638) | 180,543 | 819,538
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |
Purchase of short-term investments |  | (2,108,820) | (302,913) | (4,352,103) | (2,139,097)
Proceeds from maturity of short-term investments |  | 2,905,788 | 417,390 | 3,708,810 | 1,931,027
Loan to employees |  | (33,085) | (4,752) |  |
Net cash (used in) / generated from investing activities |  | 729,546 | 104,794 | (1,186,721) | (615,895)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |
Amounts due from related parties |  |  |  | 253,672 | 7,944
Proceeds from initial public offering, Net of issuance cost of 80,128 | ¥ 1,109,517 |  |  | 1,109,517 |
Capital contribution from Series B and B+ convertible redeemable preferred shareholders |  |  |  |  | 732,709
Net cash generated from / (used in) financing activities |  | (64,150) | (9,214) | 1,587,343 | 341,472
Effect of exchange rate changes |  | 21,567 | 3,095 | 108,186 | (8,759)
Net increase in cash and cash equivalents |  | 153,416 | 22,037 | 689,351 | 536,356
Cash and cash equivalents at beginning of the year |  | 1,248,810 | 179,380 | 559,459 | 23,103
Cash and cash equivalents at end of the year |  | 1,402,226 | 201,417 | 1,248,810 | 559,459
Parent Company |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |
Net loss |  | (394,817) | (56,713) | (926,886) | (918,714)
Adjustments to reconcile net loss to net cash generated from operating activities: |  |  |  |  |
Share-based compensation |  | 2,970 | 427 | 3,851 | 288,763
Loss from investment in subsidiaries |  | 413,496 | 59,395 | 1,032,235 | 813,313
Amounts due to subsidiaries |  | (398,587) | (57,253) | (185,537) | (751,735)
Prepaid expenses and other current assets |  | 18,032 | 2,594 | (19,276) |
Other non-current assets |  | (3,394) | (488) | 11,228 |
Accrued expenses and other current liabilities |  | 1,531 | 220 | 4,231 | 75
Net cash generated from/(used in) operating activities |  | (360,769) | (51,818) | (80,154) | (568,298)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |
Purchase of short-term investments |  |  |  | (814,539) |
Proceeds from maturity of short-term investments |  | 436,228 | 62,660 | 396,852 |
Loan to employees |  | (26,849) | (3,857) |  |
Net cash (used in) / generated from investing activities |  | 409,379 | 58,803 | (417,687) |
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |
Amounts due from related parties |  |  |  | 245,654 |
Payment for share repurchase |  | (31,650) | (4,546) | (33,971) |
Proceeds from initial public offering, Net of issuance cost of 80,128 |  |  |  | 1,109,517 |
Capital contribution from Series B and B+ convertible redeemable preferred shareholders |  |  |  |  | 732,709
Net cash generated from / (used in) financing activities |  | (31,650) | (4,546) | 1,321,200 | 732,709
Effect of exchange rate changes |  | 21,567 | 3,095 | 107,510 | (8,759)
Net increase in cash and cash equivalents |  | 38,527 | 5,534 | 930,869 | 155,652
Cash and cash equivalents at beginning of the year |  | 1,086,521 | 156,069 | 155,652 |
Cash and cash equivalents at end of the year |  | ¥ 1,125,048 | $ 161,603 | ¥ 1,086,521 | ¥ 155,652

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